event.html

<p id="content_styler">                        
  Electron enables you to create desktop applications with pure JavaScript by providing a runtime with rich native (operating system) APIs. You could see it as a variant of the Node.js runtime that is focused on desktop applications instead of web servers.
</p> 
<button id="activate_button" onclick="performFunction()">Click Me!</button>
<script>
  function performFunction() {
    var p = document.getElementById("content_styler");
    p.innerHTML = "I am the changed text";
  }
</script>